Ink cartridge



FIG. 1 is a front view of my inventive design for ink cartridge;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a perspective view thereof from above; and,

FIG. 8 is a perspective view thereof from below. 

The ornamental design for ink cartridge, as shown and described. 